back bridge relay

例句：

1. 1. The back bridge relay is responsible for controlling the flow of electricity.
   回程继电器负责控制电流的流动。
2. 2. The circuit breaker is a back bridge relay that automatically shuts off power when it detects an overload.
   断路器是一种自动断开电源的回程继电器，当检测到过载时会自动关闭。
3. 3. The back bridge relay is used in many industrial applications to control and monitor electrical systems.
   回程继电器在许多工业应用中用于控制和监测电气系统。